“SPERM PRODUCTION RATES OF EUROPEAN BOARS RAISED AND MAINTAINED IN THE HUMID TROPICS WITH A NOTE ON SORBITOL DEHYDROGENASE ACTIVITY AS AN INDEX OF SPERMATOGENESIS ”. Nigerian Journal of Animal Production, vol. 4, no. 2, Jan. 2021, pp. 59-64, https://doi.org/10.51791/njap.v4i2.2294.